SE210
I think the discussion, whether an old plane is safe is wrong.
Of course it is, but that's nothing new. After the Adam Air crash, before the flight recorders had even been recovered, some Indonesian officials proposed that aircraft over 10 years of age be replaced.
http://flightsafety.org/asw/apr07/asw_apr07_p5.pdf
The investigation however revealed maintenance issues as the root cause of the accident. (The maintenance records for the three months preceding the crash included 154 recurring IRS faults that were never properly resolved.
The accident crew were focused on troubleshooting such an IRS fault when they lost control of the aircraft.)
http://flightsafety.org/asw/jun08/asw_jun08_p36-40.pdf